[XPERIA X10 Q&A, Help & Troubleshooting] lazy7811:
I bricked my X10 (so-01b) and got Yellow exclamation mark after I tried to debrand it by SEUS.

After that, I tried almost all the methods posted on the website.

1. Using the X10flash tools including unbricked method and root method(first step).

It seems flash is working, however the flash procedure last only around 3 minutes not 5 minutes as most people mentioned. It also ended up with a "test" which means the flashing is completed without any error.

However, after removing the cable, rebooting the phone, Yellow exclamation mark is still there.

2. Method of replacing the Java file into the plugins folder and adding x10a~~ files into the folder of the Update Service of the SESU, also deleting the db folder before flashing.

Restore/repair by SEUS, downloading and flashing was running smoothly and ended up with flashing successfully.

However, after removing the cable, rebooting the phone, Yellow exclamation mark is still there.

3. Deleted the SEUS , re-installed, and changed another brand new cable.Tried the method 2 mentioned above.

However, the result is the same. Failed.

4. Using Omnious. Flashing end up with "Failed" and an error code returned, which you can take a look as following. Result is the same as above three.after removing the cable, rebooting the phone, Yellow exclamation mark is still there.

Action journal
22:29:08 Flash
22:29:08 Allows to change languages supported by the phone and upgrade its firmware.
22:29:08 Operating system: Microsoft Windows XP Professional Service Pack 3 (build 2600)
22:29:08 Application version: 0.07.2279 (beta)
22:29:08 . The action name is 'Flash'
22:29:08 Selected phone type: Xperia™ X10
22:29:08 i Instructions
22:29:08 i 1. Make sure the phone battery is charged to at least 50%.
22:29:08 i 2. Switch off the phone!
22:29:08 i 3. Remove the phone battery and wait at least 5 seconds before reinserting it!
22:29:08 i 4. Press and hold the return back button, then connect the cable to the phone!
22:29:08 . The action started waiting for the user
22:29:25 . The action finished waiting for the user
22:29:25 Connecting via SEMC USB Flash Device (USB3)...
22:29:25 Device driver version: 2.2.0.5
22:29:25 Detected chipset: QSD8250
22:29:25 Boot mode: EROM
22:29:25 IMEI: 35949603234@@@
22:29:25 Sending loader...
22:29:26 Establishing connection to the server...
22:29:29 Receiving news...
22:29:34 i No news
22:29:34 Actual credit: 0.00
22:29:40 Writing file phone.zip...
22:30:18 Writing file X10i_GENERIC_1234_8465R8A_R1FB001.zip...
22:33:38 e Failed!
22:33:38 . The action entered shutdown phase
22:33:38 . The action reported failure

Error code
# E39CDD9F86C3082E

Error details
---
61 C6 C0 A4 65 CB CD 00 FF 08 E1 72 F3 9F B5 AE
13 9B E7 8D E5 86 63 FA 78 BD E4 7E ED 5F 85 68
09 52 D0 4B 3E 18 6D E0 61 94 3A D6 3F 7D 06 ED
11 DB BB C5 11 03 FE 12 A2 17 E5 DB 4F B0 1E 0D
C5 5C E6 DF 47 8B A0 93 02 E4 6C 19 80 4D 59 91
46 C1 3B 15 F6 69 01 6B CA 64 A3 13 2E 26 7A 7C
7E AD 9A 9E 1D EB 00 E8 80 F0 7A 96 0F 25 D0 BA
D5 FD 93 6D 4B 5B 30 D9 6C D7 4D 92 B4 C0 04 64
F7 56 66 50 2A AA 3B E5 F3 13 07 8D EE A3 41 61
48 50 E9 72 04 6F 71 F5 55 D4 0A 0C 6D 2F 05 E8
77 58 E8 34 2A 17 BD A1 E1 9A FF 0A ED 48 D5 09
C7 38 25 15 95 C7 43 B0 6F 20 0C E7 BD 5C 0B 29
17 8E 39 EE F3 F9 7F 69 EF 5B A1 DC B3 74 21 FF
19 DE A7 ED 25 46 5D DE 0F B6 8F 34 FD F2 BB 58
E7 3F D9 C4 D5 24 2D E1 A1 DA BF 44 5B 79 BB 34
F9 22 57 42 85 66 03 14 99 C1 7C 7F
---

I can show you my hardware infomation identified by Omnious.

Action journal
23:48:43 Identify
23:48:43 Shows detailed information about the connected phone.
23:48:43 Operating system: Microsoft Windows XP Professional Service Pack 3 (build 2600)
23:48:43 Application version: 0.07.2279 (beta)
23:48:43 . The action name is 'Identification'
23:48:43 Selected phone type: Xperia™ X10
23:48:43 Selected connection method: USB EROM
23:48:43 i Instructions
23:48:43 i 1. Make sure the phone battery is charged to at least 50%.
23:48:43 i 2. Switch off the phone!
23:48:43 i 3. Remove the phone battery and wait at least 5 seconds before reinserting it!
23:48:43 i 4. Press and hold the return back button, then connect the cable to the phone!
23:48:43 . The action started waiting for the user
23:48:50 . The action finished waiting for the user
23:48:50 Connecting via SEMC USB Flash Device (USB3)...
23:48:50 Device driver version: 2.2.0.5
23:48:50 Detected chipset: QSD8250
23:48:50 Boot mode: EROM
23:48:50 EROM version: 1226-2253 R8A013
23:48:50 IMEI: 35949603234@@@
23:48:50 Device ID: 7E2914576285FCBDDB99FD73DE3CC610FDEF4539
23:48:50 Minimum loader AID: 0001
23:48:50 Minimum software AID: 0001
23:48:50 Minimum EROM AID: 0001
23:48:50 Minimum customization AID: 0001
23:48:50 Minimum simlock AID: 0001
23:48:50 Serial number: CB511JJNU6
23:48:50 Color: Red SEMC
23:48:50 Simlock state:
23:48:50 Phone model (from TA): SO-01B
23:48:50 Current CXC (from TA): 1227-4612_R1EA018
23:48:50 Current CDA (from TA): 1233-7397_R16A
23:48:50 Current FS (from TA): 1227-4607_R1EA018
23:48:50 Sending loader...
23:48:51 Waiting for loader response...
23:48:52 Flash chip ID: 002C-00B3
23:48:52 Turning off the phone...
23:48:54 i Please disconnect battery and cable from the phone!
23:48:54 s Successfully done.
23:48:54 . The action entered shutdown phase
23:48:54 . The action reported success

Additional details
---
2C B5 7E 53 CE E0 A6 3F 3C 23 1E 6B 18 79 5E 29
34 FB 48 D0 90 2F EA 9F 2C DC 52 9B F8 29 3A 1E
72 19 76 4D 80 8F 86 61 E4 89 80 CF 76 E9
---

I feel really sad and frustrated, seems most of the guys here can solve the Yellow exclamation mark issue with one of the 4 methods I have tried. I really need your help!

Thanks a million in advance!